Well, this is kind of complicated. The first place you should go for help is not this list, but the R docs. Specfically ?call. This assumes familiarity with R's (S3) class system and language structure, however.. For this, I suggest ?UseMethod and consulting the R Language Definition Manual.
Perhaps some brave soul on this list will attempt a short explanation in reply. But I am not (s)he. Cheers, Bert Oh -- as for specific suggestions, I think you need to do what the posting guide asks and provide a minimal reproducible example to give people a clearer idea of what's going on. On Fri, Jun 24, 2011 at 2:58 PM, Rita Carreira <ritacarre...@hotmail.com> wrote: > > I have a list called "tabs" that I would like to have the same structure as > my list "eqSystem." The two look like they have the same format but they are > different because when I look at their attributes, class(eqSystem[[1]]) is > "call" but class(tabs[[1]]) is "formula". I want to have class(tabs[[1]]) as > a call too. So what does "call" mean? And how do I make an object of type > "formula" be of type "call"? > Thank you so much!!!--Rita >> class(tabs) > [1] "list" >> class(tabs[1]) > [1] "list" >> class(tabs[[1]]) > [1] "formula"> class(eqSystem) > [1] "list" >> class(eqSystem[1]) > [1] "list" >> class(eqSystem[[1]]) > [1] "call" > > > Rita > ===================================== > "If you think education is expensive, try ignorance."--Derek Bok > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- "Men by nature long to get on to the ultimate truths, and will often be impatient with elementary studies or fight shy of them. If it were possible to reach the ultimate truths without the elementary studies usually prefixed to them, these would not be preparatory studies but superfluous diversions." -- Maimonides (1135-1204) Bert Gunter Genentech Nonclinical Biostatistics ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.